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- //===- DWARFDebugPubTable.cpp ---------------------------------------------===//
- //
- // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
- // See https://llvm.org/LICENSE.txt for license information.
- // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
- //
- //===----------------------------------------------------------------------===//
- #include "llvm/DebugInfo/DWARF/DWARFDebugPubTable.h"
- #include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
- #include "llvm/ADT/StringRef.h"
- #include "llvm/BinaryFormat/Dwarf.h"
- #include "llvm/Support/DataExtractor.h"
- #include "llvm/Support/Errc.h"
- #include "llvm/Support/Format.h"
- #include "llvm/Support/raw_ostream.h"
- #include <cstdint>
- using namespace llvm;
- using namespace dwarf;
- void DWARFDebugPubTable::extract(
- DWARFDataExtractor Data, bool GnuStyle,
- function_ref<void(Error)> RecoverableErrorHandler) {
- this->GnuStyle = GnuStyle;
- Sets.clear();
- uint64_t Offset = 0;
- while (Data.isValidOffset(Offset)) {
- uint64_t SetOffset = Offset;
- Sets.push_back({});
- Set &NewSet = Sets.back();
- DataExtractor::Cursor C(Offset);
- std::tie(NewSet.Length, NewSet.Format) = Data.getInitialLength(C);
- if (!C) {
- // Drop the newly added set because it does not contain anything useful
- // to dump.
- Sets.pop_back();
- RecoverableErrorHandler(createStringError(
- errc::invalid_argument,
- "name lookup table at offset 0x%" PRIx64 " parsing failed: %s",
- SetOffset, toString(C.takeError()).c_str()));
- return;
- }
- Offset = C.tell() + NewSet.Length;
- DWARFDataExtractor SetData(Data, Offset);
- const unsigned OffsetSize = dwarf::getDwarfOffsetByteSize(NewSet.Format);
- NewSet.Version = SetData.getU16(C);
- NewSet.Offset = SetData.getRelocatedValue(C, OffsetSize);
- NewSet.Size = SetData.getUnsigned(C, OffsetSize);
- if (!C) {
- // Preserve the newly added set because at least some fields of the header
- // are read and can be dumped.
- RecoverableErrorHandler(
- createStringError(errc::invalid_argument,
- "name lookup table at offset 0x%" PRIx64
- " does not have a complete header: %s",
- SetOffset, toString(C.takeError()).c_str()));
- continue;
- }
- while (C) {
- uint64_t DieRef = SetData.getUnsigned(C, OffsetSize);
- if (DieRef == 0)
- break;
- uint8_t IndexEntryValue = GnuStyle ? SetData.getU8(C) : 0;
- StringRef Name = SetData.getCStrRef(C);
- if (C)
- NewSet.Entries.push_back(
- {DieRef, PubIndexEntryDescriptor(IndexEntryValue), Name});
- }
- if (!C) {
- RecoverableErrorHandler(createStringError(
- errc::invalid_argument,
- "name lookup table at offset 0x%" PRIx64 " parsing failed: %s",
- SetOffset, toString(C.takeError()).c_str()));
- continue;
- }
- if (C.tell() != Offset)
- RecoverableErrorHandler(createStringError(
- errc::invalid_argument,
- "name lookup table at offset 0x%" PRIx64
- " has a terminator at offset 0x%" PRIx64
- " before the expected end at 0x%" PRIx64,
- SetOffset, C.tell() - OffsetSize, Offset - OffsetSize));
- }
- }
- void DWARFDebugPubTable::dump(raw_ostream &OS) const {
- for (const Set &S : Sets) {
- int OffsetDumpWidth = 2 * dwarf::getDwarfOffsetByteSize(S.Format);
- OS << "length = " << format("0x%0*" PRIx64, OffsetDumpWidth, S.Length);
- OS << ", format = " << dwarf::FormatString(S.Format);
- OS << ", version = " << format("0x%04x", S.Version);
- OS << ", unit_offset = "
- << format("0x%0*" PRIx64, OffsetDumpWidth, S.Offset);
- OS << ", unit_size = " << format("0x%0*" PRIx64, OffsetDumpWidth, S.Size)
- << '\n';
- OS << (GnuStyle ? "Offset Linkage Kind Name\n"
- : "Offset Name\n");
- for (const Entry &E : S.Entries) {
- OS << format("0x%0*" PRIx64 " ", OffsetDumpWidth, E.SecOffset);
- if (GnuStyle) {
- StringRef EntryLinkage =
- GDBIndexEntryLinkageString(E.Descriptor.Linkage);
- StringRef EntryKind = dwarf::GDBIndexEntryKindString(E.Descriptor.Kind);
- OS << format("%-8s", EntryLinkage.data()) << ' '
- << format("%-8s", EntryKind.data()) << ' ';
- }
- OS << '\"' << E.Name << "\"\n";
- }
- }
- }
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